204523021404239 has 4 divisors (see below), whose sum is σ = 204638115959424. Its totient is φ = 204407926849056.

The previous prime is 204523021404193. The next prime is 204523021404277. The reversal of 204523021404239 is 932404120325402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204523021404239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204523021404196 and 204523021404205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204523021401239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57547274927 + ... + 57547278480.

It is an arithmetic number, because the mean of its divisors is an integer number (51159528989856).

Almost surely, 2^{204523021404239} is an apocalyptic number.

204523021404239 is a deficient number, since it is larger than the sum of its proper divisors (115094555185).

204523021404239 is a wasteful number, since it uses less digits than its factorization.

204523021404239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115094555184.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 204523021404239 in words is "two hundred four trillion, five hundred twenty-three billion, twenty-one million, four hundred four thousand, two hundred thirty-nine".